JERSEY CITY -- The murder trial of a Jersey City man accused of strangling the mother of one of his children heard testimony today from a woman who was caught in bed with him the morning of the homicide.

Nathan Williams III, 36, is accused of killing Marilyn Albizu, 33, on June 17, 2014, in the Old Bergen Road home they shared, although they were no longer a couple.

During opening statements yesterday, the prosecution said Williams became enraged because Albizu told Lenisha Murray -- the mother of another of Williams' children -- that he was with a third woman. Murray went to the home and found him in bed with Alicia Santana that morning.

Santana told the court that Murray asked her why she was there that day and Murray reaffirmed that she and Williams "been chillin' with each other," adding that Murray was pregnant. Santana said she responded by saying she was done with Williams.

Santana said Williams then went to the kitchen where Albizu was and heard Albizu yell, "Don't hit me..." When Albizu, Murray and Williams headed to the front door, Santana said he stopped her and said "not to go outside because I might get jumped."

Santana said Williams grabbed his keys and left. Albizu called police and the three women stayed at the home for some time. They later rode together to Walmart to drop Murray off.

Albizu told police Williams hit her and the responding officer testified today that she had a bump on her head. Although Albizu chose not to give a statement to police, a warrant was issued for his arrest.

The prosecution asserts that as the hours passed, Williams became more and more enraged at Albizu for telling Murray he was with a third woman. When officers responded to the home for a welfare check later that day, they found Albizu's body.

Williams was arrested later that night after a police chase that ended with him jumping off a Newark overpass, breaking his legs and a hip in the fall. After the autopsy, he was charged with murder.

Santana said she received a number of calls and text from Santana after the incident that morning but in the afternoon there was a gap of more than an hour. The next text read, "Sorry."

Earlier today, the jury heard testimony from a medical examiner and saw photos of Albizu's bruised body as he testified that she had been strangled and likely suffered some of her injuries during the struggle for her life.

Santana's testimony reinforced what Murray said happened the morning of the murder. The defense has argued that no one witnessed the murder and the prosecution has no DNA or fingerprint evidence connecting Williams to the scene.